英语词汇fluctuation的起源、历史背景-英语词源词典

词汇	fluctuation
词源	fluctuation n. mid-15c., from Old French fluctuacion (12c.) or directly from Latin fluctuationem (nominative fluctuatio) "a wavering, vacillation," noun of action from past-participle stem of fluctuare "to undulate, to move in waves," from fluctus "a wave, billow, surge, a flowing," from past participle of fluere "to flow" (see fluent). Entries linking to fluctuation fluent adj. 1580s, "flowing freely" (of water), also, of speakers, "able and nimble in the use of words," from Latin fluentem (nominative fluens) "lax, relaxed," figuratively "flowing, fluent," present participle of fluere "to flow, stream, run, melt," from extended form of PIE bhleu- "to swell, well up, overflow" (source also of Latin flumen "river;" Greek phluein "to boil over, bubble up," phlein "to abound"), an extended form of root bhel- (2) "to blow, swell." Used interchangeably with fluid (adj.) in 17c. in the sense "changeable, not rigid." Related: Fluently. fluctuant adj. "moving like a wave," 1550s, from Latin fluctuantem (nominative fluctuans), present participle of fluctuare "to move in waves" (see fluctuation). updated on March 08, 2019
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fluctuation n.